Telepowered contactless card
    3.
    发明授权

    公开(公告)号:US12132495B2

    公开(公告)日:2024-10-29

    申请号:US18069459

    申请日:2022-12-21

    CPC classification number: H03M1/124 H04B5/72 G06K19/07773 H04B5/00

    Abstract: The present disclosure concerns an electronic device connected to an antenna. The electronic device delivers a first amplitude-modulated analog signal of a signal captured by the antenna, the capture signal associated with an electromagnetic field exhibiting intervals at a minimum level. The electronic device includes a first circuit, a second circuit, and a third circuit. The first circuit delivers a second analog signal by rectification and filters the first analog signal. The second circuit delivers a first binary signal based on the demodulation of the second analog signal. The third circuit couples the antenna to a resistor during each pause. The resistance value of the resistor depends on the maximum amplitude of the electromagnetic field before the pause.

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